Rosser



c. E. CLOWES ROSSER March 27, 1928. 1,663,794

Filed Feb. 24, 1927 Invert tor Patented Mar. 27, 1928; I

v UNITED sr r ewes CHARLES ERNEST cLoWEs, or nnnnnnroron, NEW-BRUNSWICK,CANADA.

ROSSER Application filed February 24, 1a'2'7. Serial No. 170,576.

The invention relates to improvements iii rossers as described in thepresent specificasupportingthe log during such operation,

whioh may be ofconventional or special 'de- According to the presentinvention, a log,

hereinafter referred to as the; stick, is

I slowly revolved and held againsttravelin'g instruments set atanegativeangle'in order to rose the stick'by scraping off the bark.These scrapers move lengthwise of the :log so as towork with the grain,the log being held side-on, the gradual rotation effecting completeremoval of the bark.

The scrapers are designed to 'be adjustable" so that the angle ofcontact may be changed to suit different species and condition of wood.For instance arun of logs which are hard or frozen will necessitate.that the angle of inclination be lessthan that for handling softer ornewly cut wood;

A very distinctive feature of the present inventionlies in the mountingof the scrapers whereby they accommodate themselves to irregularities ofthe sticks surface to the end thatupon encountering a knot or otherobstruction they ride over it. Other features will become manifest asthe description proceeds. i p V,

In the drawings, Figure 1 is a side elevation of'the invention slightlyin section, depicting in conjunction therewith apart of the workholdingdevice,

Figure 2 is a front end elevation of Figure 1.

Figure 3 is a detaile d-planview ,of one of the links of the endlessband.

Figure 4 is a sectional view taken on the line 4-4 of Figure 3.

Figure 5 is a diagrammatic View ex log is held hinting the aches of thegem' ers in pass-' mgover irregularitiesof the logs surface,

, Like numeralsof reference indicate corresponding parts in each of the.figure's throughout the drawings.

In the drawings thereference numeral'lO designates the log. or stickwhich islshown supported by means of a workh'older gen'-- erallyindicated by the numeral '11. This workholder is shown by way .ofexample and not of limitatiionas it willibe readily apparent to thoseskilled in the art that there are numerous typesof workhelders whichmight be equally well employed: that shown in the drawings consists ofan endlessfbelt 12 upon. which the driven fromi'a sonrce of power. 14 isan end stop, for tal'rin'gfaxial thrust of the log due to the scrapingaction ofthetools. 1:5 is a side rest for centeringthe log. The rotationof the endless beltjl2slowly revolves the log andthe rest 15 preventsitslateral movement,- so that by this construction the what-is generallyknown as" sideon against the scrapers;

16 generally indicates theendless band 10 rests; -Sa id'bltis passedoverpulleys 13 whichare suitablycomposed of links as at 17. The band is"carried at its forward end "byi'sprockets 1 8,

18', and at its rear end by further sprockets are supported shafts 19..These sprockets as .at 20, onepair of nected to a source of the driver.Intermediate of each .linkis a scraper as atv 21, while on theother sideis a. rolleras at'22 which travels over a rail 23 in order to holdthescrapers against the logand take the thrust thereof. b

Each link consists of a pair of link bars 24, 24,,secured to a toolholder 25. This tool holder is preferably a casting and ex ten'dsbetween the two members 24; 24 and is secured to the same by a bolt 26having a nut 27 threadedly engaged thereto and'bearwhich sprocket ismnfing against the member 24. Toprovi'de for adjustment of theangularity o'fthe scraper 7 tool interlocking teeth as @1128 areprovided at the ends'of the tooth holder stand inner sides of themembers '24:, 24. These bolt is tightened. Toadjust the tool holderbythis construction, it is merely necessary v power and functions as] tounloosen the bolt and nut sufliciently to spread the members 2a, 24: andthen turn the holder 25 to give the desired adjustment. It is thensecured by the retightening of the bolt.

29 indicates the scraper tool which has a working edge 30 chisel-shapedin cross secon the rail 23 which functions as a thrust sustainingsurface for the scrapers.

- teeth spaces Each of the members 24, 24, of the link carries a rolleras at 33 for engaging the of the sprockets over which the endless bandtravels.

" Iteferring to the diagrammatic illustration given in Figure 5,v Arepresents the irregular surface of the log and B an obstruction such asa knot, C shows a scraper contacting with this obstruction and thrown atan angle so as to accommodate it, which will of course occur in anyirregularity of the logs surface.

It will be seen thatthe tension ofthe links has a tendency to hold themin the line of motion, whereas, upon striking an obfstructiom'theresistance being on one side V-shaped as shown at of the'line of motioncauses a yielding due to the link being thrown upwardly as shown.

Directly the obstruction is passed the tension straightens the-linkagain and it is held in this position by the pull on the workng side ofthe belt.

Adverting to the scraper teeth, in order to obtain as great a line ofcontact as possible with the log, it is proposed to relieve the workingedge of the teeth as shown in the drawings by making a cutting edgeslightly 34. The same result may be obtained by shaping the cutting edgein various ways or by providing a number of scrapers; hence it is notintended to limit the invention in this respect.

In the operation of the invention it will be seen that as the endlessband is set in mo tionthe scrapers will traverse the log for its entirelength and that with the slow rotatory movement of the logthe entirebark will be eventually removed. The rail 23 supports the thrust of thescraping tools during their entire working stroke. This rail is ofcourse suitably supported in any desirable manner. v Whereas a singlerail has been shown in the preferred embodiment of the invention forcooperating with a roller disposed intermediate of the width of eachlink of the endless chain, itwill be manifest to those skilled in theart that a plurality of rails might be employed side-byside; forinstance, together with a number of rollers attached to each link, andthat other variations and modifications might be resorted to withoutdeparting from the spirit and scope of the invention.

'Having now described the preferred forms of the embodiment of theinvention capable of carrying the same into practical operation, it isdistinctly understood that such changes and modifications maylie-resorted to as may fairly come within the spirit and scope of theinvention and claims-hereinafter following;

lVhat I claim is 1. In a rossing machine, sprockets disposed in spacedrelation, a travelling belt therefor, a scraper rigidly projecting from7 each link thereof presenting acontinuous series of working edges alongone side of the belt between the sprockets for engagement axially with aside of the stick, rollers, one borne by each link in the thrust line orthe scraper, and a rail extending parallel to the line of motionpresenting-a thrust -sustaiuing surface for the-rollers.

2.1a a rossing machine, an endless belt composed of tool carrying links,eachlink consisting of a pair of spaced'link bars, a toolholderextending between said bars and provided with teeth for interlockingwith teeth borne by the abutting faces of the bars, a bolt and nutsecuring the toolholder to the bars and a scraping tool affixed to saidholder transversely of the link.

3. In a rossing machine, an endless link belt for operation over spacedsprocket-s, a member extending parallel to and in close proximity to therear of the working side of the belt, said member presenting a rigidthrust sustaining surface, a scraper attached to each link of the'belt,the scraping edge thereof being located on the outside of the links andintermediate of their respective ends and a roller attached to each linkon the inner side thereof and directly in the thrust line of eachscraper whereby the thrust of the scraper is'not only transmitted

